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Author Topic: Step by step BM HRM build...  (Read 69360 times)
rvf263
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« Reply #75 on: January 28, 2010, 04:30:22 AM »

9. Installed the boards... warning !!! , do the main board first and then power board... I installed the power board first and man was I angry when I had to run those wires to presence pot or to power tubes  Angry
...anyway as you can see I still need to wire V1,V2,V3 sockets
 Wink

Hi mcinku,
I have a couple questions if you don't mind.
On the power board in this pic (step 9), can you tell me where those 3 black wires are going? The Layout says OT/CT/Choke but I'm not sure where that is.

1.) In your step #8 pic there is a black wire left over from the OT primaries, is that the wire for the OT on the power board?
2.) What is CT stand for and where is it located?
3.) Doesn't the choke have 2 wires? If one wire goes to the power board, where does the other choke wire go?


I hope these questions make sense...


Thanks!
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RvF
mcinku
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« Reply #76 on: January 28, 2010, 05:29:49 AM »

Hi mcinku,
I have a couple questions if you don't mind.
On the power board in this pic (step 9), can you tell me where those 3 black wires are going? The Layout says OT/CT/Choke but I'm not sure where that is.
Black wires are Choke and OT,... on the primary side you have CT wire which goes 200uF filter cap.

1.) In your step #8 pic there is a black wire left over from the OT primaries, is that the wire for the OT on the power board?
Yes that one  Wink

2.) What is CT stand for and where is it located?
Not sure I think it's Central Tap.

3.) Doesn't the choke have 2 wires? If one wire goes to the power board, where does the other choke wire go?
Both wires go to the power board. One end to the 200uF filter cap and the other end to the 20uF filter cap.
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rvf263
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« Reply #77 on: January 28, 2010, 07:47:49 AM »

Thanks for your help!
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RvF
axiology
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« Reply #78 on: April 02, 2010, 12:38:01 PM »

Hi, new forum member first post. Just starting my OTS build. I hate to say this, and maybe I'm wrong but looking at the pics in the first post in the thread, I think you've used the wrong wire for the heaters. If you check out the pic here: http://www.ceriatone.com/images/completeAmpsPic/CTOvertone/c11B.jpg and other pics of amp internals, you'll see that heavier gage wire is used for heaters. Understandably they must be required to conduct a fair amount of amperage, because they are after all the tube heaters....

Edit:The insulation on the wire supplied as "heater wire" on the parts list is much thicker, but the actual internal wire itself is just a little larger than that of the supplied black and white wires. So this may not be a big issue...
« Last Edit: April 02, 2010, 01:32:52 PM by axiology » Logged
mcinku
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« Reply #79 on: April 02, 2010, 03:04:36 PM »

the wires I used for heaters will handle the current just fine.

BTW this is Niks BM HRM picture...

same wire as mine.

I used this one cause it's easier to wire. I used the heavier gage wire on my TW build and I didn't like it... way harder to do it right.
 Wink
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